diff --git a/UI/MailPartViewers/UIxMailPartEncryptedViewer.m b/UI/MailPartViewers/UIxMailPartEncryptedViewer.m
index d95feaced..01e8c7fda 100644
--- a/UI/MailPartViewers/UIxMailPartEncryptedViewer.m
+++ b/UI/MailPartViewers/UIxMailPartEncryptedViewer.m
@@ -175,15 +175,15 @@
 	  ERR_load_crypto_strings();
           SSL_load_error_strings();
           sslError = ERR_reason_error_string(err);
-          validationMessage = [[self labelForKey: [NSString stringWithUTF8String: sslError ? sslError : @"No error information available"]] retain];
+          validationMessage = [[self labelForKey: [NSString stringWithUTF8String: sslError ? sslError : @"Digital signature is not valid"]] retain];
 #elif OPENSSL_VERSION_NUMBER < 0x10100000L
           const char* sslError;
 	  ERR_load_crypto_strings();
           SSL_load_error_strings();
           sslError = ERR_reason_error_string(err);
-          validationMessage = [[self labelForKey: [NSString stringWithUTF8String: sslError ? sslError : @"No error information available"]] retain];
+          validationMessage = [[self labelForKey: [NSString stringWithUTF8String: sslError ? sslError : @"Digital signature is not valid"]] retain];
 #else
-	  validationMessage = [[self labelForKey: @"No error information available"] retain];
+	  validationMessage = [[self labelForKey: @"Digital signature is not valid"] retain];
 #endif /* HAVE_GNUTLS */
 
            BUF_MEM *bptr; //DEL
diff --git a/UI/MailPartViewers/UIxMailPartSignedViewer.m b/UI/MailPartViewers/UIxMailPartSignedViewer.m
index 9422e186c..8269c2609 100644
--- a/UI/MailPartViewers/UIxMailPartSignedViewer.m
+++ b/UI/MailPartViewers/UIxMailPartSignedViewer.m
@@ -173,15 +173,15 @@
 	  ERR_load_crypto_strings();
           SSL_load_error_strings();
           sslError = ERR_reason_error_string(err);
-          validationMessage = [[self labelForKey: [NSString stringWithUTF8String: sslError ? sslError : @"No error information available"]] retain];
+          validationMessage = [[self labelForKey: [NSString stringWithUTF8String: sslError ? sslError : @"Digital signature is not valid"]] retain];
 #elif OPENSSL_VERSION_NUMBER < 0x10100000L
           const char* sslError;
 	  ERR_load_crypto_strings();
           SSL_load_error_strings();
           sslError = ERR_reason_error_string(err);
-          validationMessage = [[self labelForKey: [NSString stringWithUTF8String: sslError ? sslError : @"No error information available"]] retain];
+          validationMessage = [[self labelForKey: [NSString stringWithUTF8String: sslError ? sslError : @"Digital signature is not valid"]] retain];
 #else
-	  validationMessage = [[self labelForKey: @"No error information available"] retain];
+	  validationMessage = [[self labelForKey: @"Digital signature is not valid"] retain];
 #endif /* HAVE_GNUTLS */
       }
     }
diff --git a/UI/MailerUI/English.lproj/Localizable.strings b/UI/MailerUI/English.lproj/Localizable.strings
index 8785ac9ab..2ce267cdb 100644
--- a/UI/MailerUI/English.lproj/Localizable.strings
+++ b/UI/MailerUI/English.lproj/Localizable.strings
@@ -276,7 +276,7 @@
 "Message is signed" = "Message is signed";
 
 /* Unknown error while validating message signature */
-"No error information available" = "No error information available";
+"Digital signature is not valid" = "Digital signature is not valid";
 
 "This Folder" = "This Folder";